[Bug] `JSONDocument.getNodeFromOffset` is not a function at runtime

Reproducible in vscode.dev or in VS Code Desktop?

• Not reproducible in vscode.dev or VS Code Desktop

Reproducible in the monaco editor playground?

• Not reproducible in the monaco editor playground

Monaco Editor Playground Link

https://microsoft.github.io/monaco-editor/playground.html?source=v0.50.0#XQAAAAJQBQAAAAAAAABBqQkHQ5NjdMjwa-jY7SIQ9S7DNlzs5W-mwj0fe1ZCDRFc9ws9XQE0SJE1jc2VKxhaLFIw9vEWSxW3yscw83J8RgmSaumWUF-TBOsVJ4S4FwfCDQb5-2uUHXTVAefbVSd9IzaZ_vv9VR9KugsKiuGc2v5CrpC-28kzerv7FIINy73ctGSXrXyLSJzMzDkuKaa3tMg-UK4lhIYaP9NgpLNPfl7xF4BFMGqe-EJcVnNjGP6HeT9D9pWb93Wo4ZQgXuxOwtwin2u1xyz2Gx2slmhr8HXj7qdLwdlI27k25rc_v3AgJaKUIY-HvvR-F0sYfn_RN_g0QEv9MxSIEaFssFLtvkiFbazxmuPXPkHE0d_5xmqDVrtxkmN5uPUH9JDZF7Yd1uWIv8GMpep5xZVFvSw2-cIz0w28dQsPRy09JtpdmqY_n8RDaTrTESu5TYMgqSUFAK5NLKs_SnqA-TxUA5t2LxcbDcESk_xWw1TvxfXMdIYn2kDAktHQZpw_WFa0VsjWzI5VGXfodLhidItlPOQvpLzdH4Ubvi9ri3HxQM--aLPv4u380HU3Ut-LoNAsG1DNderr5zcICxXC9wfSh-3lGctsMGComlylPMCAu147wsBYYxTuk4rrCNAvpTYvdvkDtNYbuaz6tKxtSbM86ty-wmMi4B45WXyoykT741zQSpdgyfhF67hv6JUWVhA8cL88H1mCrWtUsyiLkYFp0dHOfje430WShbPDsEICuuNK4F_jM1Px4NL713M2FRudga9BWP5wCjpUHsE_dhg3U0HKbDsr-6QaXG-UGmWOcfuVFjEfOuM94FkVYH78P9jQRx7xr6bgf6XjoZiGKyFyKrxRVvkCwRJfIsplC3WSQAaGLXEEothGIRxm7NjXTdFCUwN1wUH_-Exwyg

Monaco Editor Playground Code

const value = /* set from `myEditor.getModel()`: */ `{
    
}`;

// Hover on each property to see its docs!
const myEditor = monaco.editor.create(document.getElementById("container"), {
	value,
	language: "json",
	automaticLayout: true,
});

// Register dynamic completions based on AST
monaco.languages.registerCompletionItemProvider('json', {
  provideCompletionItems: async (model, position, context) => {
    console.log(monaco.languages.json);

    const jsonWorker = await (
      await monaco.languages.json.getWorker()
    )(model.uri);
    const jsonDocument = await jsonWorker.parseJSONDocument(
      model.uri.toString()
    );
    console.log(jsonDocument);

    // This works just fine in Monaco Editor Playground
    const node = jsonDocument?.getNodeFromOffset(model.getOffsetAt(position));

    console.log(node);

    const word = model.getWordUntilPosition(position);

    return {
      suggestions: [
        {
          kind: monaco.languages.CompletionItemKind.Text,
          insertText: '"foo"',
          label: 'Foo',
          range: {
            startLineNumber: position.lineNumber,
            endLineNumber: position.lineNumber,
            startColumn: word.startColumn,
            endColumn: word.endColumn,
          },
        },
      ],
    };
  },
});

Reproduction Steps

I'm trying to create dynamic completions based on the JSON AST. For that I'm utilizing the functionality exposed with this PR: https://github.com/microsoft/monaco-editor/pull/4299, specifically JSONDocument.getNodeFromOffset. TypeScript tells me the method is there, but I'm getting a runtime error: Uncaught Error: jsonDocument?.getNodeFromOffset is not a function.

Reproduction environment with Vite: https://stackblitz.com/edit/vitejs-vite-bhgqgc?file=src%2Fmain.ts

Actual (Problematic) Behavior

Runtime error: Uncaught Error: jsonDocument?.getNodeFromOffset is not a function

Expected Behavior

jsonDocument?.getNodeFromOffset should work as it does in the Monaco Editor Playground.

Additional Context

No response

Start with the linked Vite reproduction and compare its JSON worker behavior with the Monaco Editor Playground example at v0.50.0. Check why the runtime JSONDocument lacks getNodeFromOffset even though TypeScript exposes it; done means the documented call works without a runtime error in the reproduction.